Fixed-wing UAVs with magnetometers, hyperspectral sensors, LiDAR. How it works: Drones map magnetic anomalies and surface mineral signatures indicative of kimberlite (diamonds), pegmatites (tourmaline, beryl), or alluvial gravels (sapphires, rubies). Case example: In 2024, a Canadian junior miner used drone magnetometry to discover a new emerald zone in Zambia – cost: $80k vs. $500k for manned survey.
For further details on specific drone models or case studies, please request appendices. gem jewels drone